Sheet-class-drawing apparatus



il,68,24 L. D. BLAcKsHERE Y SHEET GLASS DRAWING APPARATUS Aug, 7,1928;

Filed Aug. 17, 192'?4 grs/vanto@ Lew/l5 D. Bloc/wher?.

Patented Ang. 7, i238.

TES

ineen LEWS D, BLACKSHERE, OIF CHARLESTON, VJ EST VIRGI IA, ASSIGNOR TOTHELIBBEY- OWENS SHEET GLASS CQHPLIIY, OF TOLEDO, OHIO, A CORPORATIONVOF OHIO.

SHEETGLASSDRA\VING APPARATUS.

Application ledjugust 17, 1927. Serial No. 213,465.

This invention relates lto ,improvements in sheet glass drawingapparatus. y

An important object of thev present .v invention is to provide in sheetglass. apparatus wherein a Vpreferably endless drawingancL flattening'table is employed for drawing a sheet from a moltensource, means Vforprotecting the table during its sheet supporting `run from the meansVused for heating the table duringY its return or nonsheet supportingrun.

A ,I vide in sheet glass apparatus, a preferably Yernflless drawing andflattening table for dra Ying a sheet from a molten source, and meansarranged between the runs of said table for insulating the sheet"supporting run of the table together with the sheet carried thereby fromthe heating iiame directed against the return or non-sheet supportingrun thereof.v

A further object of the invention is to provide a horizontally arrangedpreferably endless drawing and 'flattening table for drawing a sheetfrom a molten source, with insulating means arranged between the-upperand lower runs of said table for protecting the upper run together withthe sheetA resting and being carried along thereupon from the blast andheat of the burners preferably used for heating the table during itslower run.

@ther objects and advantages of the invention will become more apparentduring the course of the following description when taken in connectionwith the accompanying drawings.

In the drawings forming a part of this application and wherein likenumerals are employed to designate like parts throughout the same,

Fig. 1 is a longitudinal vertical section through an apparatusconstructed in accord ance with the present invention, and

, Fig. 2 is 'a section taken substantially onV line 2-2 of Fig. 1.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of the present invention, the numeral 5 designatesa draw pot containing a source of molten glass 6 from which is drawn asheet 7 adapted to be deflected over a bending roll 8 and passed over adrawing and flattening tabledesignated in its entirety by inother objectof the invention is to pro-V the numeral 9. Arranged above the table 9are a plurality of clamp bars 10 arranged m an endless belt formationand trained about sprockets or drums 11. These clamp bars which may ormay not be used as desired extend transversely of the table 9 and `arearranged te engage the opposite edges only of sheet 7. Y

The .drawing and flattening table 9 is composed of a plurality ofpreferably metallic links 12 connected together in a manner to formsubstantially an endless flexible belt which may be trained aboutsprocketsor drums 13 and kept taut by `means of an idler 14. As shown,the table 9 is horizontally arranged with its upper run supported uponand passing over a plurality of closely associated longitudinallyextending table rails 15 mounted upon transverse supports 16, said rails15 being of a substantially inverted channel-shaped formation andserving to hold the upper run of the draw table in a substantiallyperfectly lflat horizontal plane. Y Y

To prevent too rapid cooling of the sheet 7 as it passes over thedrawing and flattening table 9 it is necessary to heat the various linksthereof and this is preferably accomplished by the use of burners 17which direct flames 18 upon the table during its lower return ornon-sheet supporting run.

It is desirable, however, that the upper sheet support-ing run of table9 together with the sheet resting thereupon be protected or insulatedfrom the blast and heat of the burners 17 in order that the best resultsin the drawing and flattening of the sheet may be obtained. Also, it ispreferable that the flames 18 be prevented from playing directly uponthe table rails 15 since this heat may tend to soften or otherwiseinjure the same.

rvTo accomplish the above objects, suitable insulating material such asindicated at 19 may be arranged within the channel-shaped rails 15 .anda heat resisting plate or slab 20 may be secured to the underside ofsaid rails. The insulating material 19 together with the slab or plate20 may be of a suitable refractory material. With such a construction,the plate 20 and material 19 will eii'ectively protect the upper sheetcarrying run of the draw table and the sheet resting thereupon from theblast and heat of the burners 17, while the plate 2() will further serveto prevent the flames from playing upon Vand softening or otherewiseinjuring the table rails 15.

It is to be understood that the form of the invention herewith shown anddescribed is `tofbe taken as the preferred embodiment )t the same, andthat vvarious changes in the shape, size and arrangement of parts may beresorted to without departing from the spirit of the invention or theseope of the nibjoin'ed claims.

' l. The combination with an endless sheet glass draw-ingapparatus drawtable, and

:meansv vfor heatingA the same, of means for protecting the sheetCarrying run of said table from said heating means.

- 2. The combination With an endless sheet glass drawing apparatus drawtable having a sheet Carr-ying run and a return run7 and means forheating the table during its return run, of means for 'protecting thevtable from the `heating means during its sheet supporting-run.

stantially horizontal plane, vand means for playing a {iame'upon thetable during' its return run, ot means between-the tWo runs of the.table for protecting the sheet Carrying run from said flame.

5. The eolnbilltinavith an end-less sheet glass drawing apparatus d 'aivtable having va sheet carrying run and a return run, means vmeans forsupporting said sheet supporting run, 'and means for lieatingsaid returnrun, of insulating means ea ed by said supper-ting means for'protestingthev same tegether with said sheet supporting run and sheetfrom said heating means. Y Y

7. IThe combination with anendl'ess sheet glass drawing apparatusVdraivtable having a sheet carrying' run and a return run, rails forsupporting said sheetearrying run, and burners for heatingsaid returnrun, of a heat resistingplatemearried by said rails for protecting thesame from the blast and heat et the burners. 1' Signedat Charleston, inthe county 'et Kanawha and State ot West Virginia,'this 12th day ofAugust, 1,927;

LE'VVIS D. BLACISIERE.

